Liquid-liquid immiscibility and phase separation in the quaternary systems K2OAl2O3CaOSiO2 and Na2OAl2O3CaOSiO2

W. D. Kingery; P. B. Vandiver; I. W. Huang; Y. M. Chiang

doi:10.1016/0022-3093(83)90090-X

Liquid-liquid immiscibility and phase separation in the quaternary systems K₂OAl₂O₃CaOSiO₂ and Na₂OAl₂O₃CaOSiO₂

W. D. Kingery, P. B. Vandiver, I. W. Huang, Y. M. Chiang

Research output: Contribution to journal › Article › peer-review

32 Scopus citations

Abstract

Additions of Al₂O₃, Na₂O or K₂O all lower the immiscibility temperature for liquid-liquid phase separation in the CaOSiO₂ system as the region of immiscibility is extended into the ternary field. Simultaneous additions of K₂O and Al₂O₃ or of Na₂O and Al₂O₃ are found to further extend the compositional region of immiscibility which reaches a maximum with equimolar additions of alkali and alumina. These results are attributed to the ability of KAlO₂ or NaAlO₂ units to substitute for SiO₂ in the liquid structure. As a consequence of liquid-liquid immiscibility, wollastonite crystallizes from the calcia-rich liquid phase. STEM analysis has been applied to the phase-separated glasses to determine the approximate K₂OAl₂O₃ ratio and overall composition of each phase to locate tie-lines for the liquid-liquid immiscibility. The tie lines are roughly parallel to the CaOSiO₂ join.

Original language	English (US)
Pages (from-to)	163-171
Number of pages	9
Journal	Journal of Non-Crystalline Solids
Volume	54
Issue number	1-2
DOIs	https://doi.org/10.1016/0022-3093(83)90090-X
State	Published - 1983
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Materials Chemistry

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@article{26ba386d7763473893dd4ee5aedc65da,

title = "Liquid-liquid immiscibility and phase separation in the quaternary systems K2OAl2O3CaOSiO2 and Na2OAl2O3CaOSiO2",

abstract = "Additions of Al2O3, Na2O or K2O all lower the immiscibility temperature for liquid-liquid phase separation in the CaOSiO2 system as the region of immiscibility is extended into the ternary field. Simultaneous additions of K2O and Al2O3 or of Na2O and Al2O3 are found to further extend the compositional region of immiscibility which reaches a maximum with equimolar additions of alkali and alumina. These results are attributed to the ability of KAlO2 or NaAlO2 units to substitute for SiO2 in the liquid structure. As a consequence of liquid-liquid immiscibility, wollastonite crystallizes from the calcia-rich liquid phase. STEM analysis has been applied to the phase-separated glasses to determine the approximate K2OAl2O3 ratio and overall composition of each phase to locate tie-lines for the liquid-liquid immiscibility. The tie lines are roughly parallel to the CaOSiO2 join.",

author = "Kingery, {W. D.} and Vandiver, {P. B.} and Huang, {I. W.} and Chiang, {Y. M.}",

note = "Funding Information: This research was supported by a US Department of Energy grant under Contract No. DE-AC02-76ER02390. The assistance of E. Laufer and P. Kearney with many of the experimental measurements is gratefully acknowledged. A portion of the study was submitted by I-Wen Huang as an S.B. thesis at MIT.",

year = "1983",

doi = "10.1016/0022-3093(83)90090-X",

language = "English (US)",

volume = "54",

pages = "163--171",

journal = "Journal of Non-Crystalline Solids",

issn = "0022-3093",

publisher = "Elsevier",

number = "1-2",

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T1 - Liquid-liquid immiscibility and phase separation in the quaternary systems K2OAl2O3CaOSiO2 and Na2OAl2O3CaOSiO2

AU - Kingery, W. D.

AU - Vandiver, P. B.

AU - Huang, I. W.

AU - Chiang, Y. M.

N1 - Funding Information: This research was supported by a US Department of Energy grant under Contract No. DE-AC02-76ER02390. The assistance of E. Laufer and P. Kearney with many of the experimental measurements is gratefully acknowledged. A portion of the study was submitted by I-Wen Huang as an S.B. thesis at MIT.

PY - 1983

Y1 - 1983

N2 - Additions of Al2O3, Na2O or K2O all lower the immiscibility temperature for liquid-liquid phase separation in the CaOSiO2 system as the region of immiscibility is extended into the ternary field. Simultaneous additions of K2O and Al2O3 or of Na2O and Al2O3 are found to further extend the compositional region of immiscibility which reaches a maximum with equimolar additions of alkali and alumina. These results are attributed to the ability of KAlO2 or NaAlO2 units to substitute for SiO2 in the liquid structure. As a consequence of liquid-liquid immiscibility, wollastonite crystallizes from the calcia-rich liquid phase. STEM analysis has been applied to the phase-separated glasses to determine the approximate K2OAl2O3 ratio and overall composition of each phase to locate tie-lines for the liquid-liquid immiscibility. The tie lines are roughly parallel to the CaOSiO2 join.

AB - Additions of Al2O3, Na2O or K2O all lower the immiscibility temperature for liquid-liquid phase separation in the CaOSiO2 system as the region of immiscibility is extended into the ternary field. Simultaneous additions of K2O and Al2O3 or of Na2O and Al2O3 are found to further extend the compositional region of immiscibility which reaches a maximum with equimolar additions of alkali and alumina. These results are attributed to the ability of KAlO2 or NaAlO2 units to substitute for SiO2 in the liquid structure. As a consequence of liquid-liquid immiscibility, wollastonite crystallizes from the calcia-rich liquid phase. STEM analysis has been applied to the phase-separated glasses to determine the approximate K2OAl2O3 ratio and overall composition of each phase to locate tie-lines for the liquid-liquid immiscibility. The tie lines are roughly parallel to the CaOSiO2 join.

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Liquid-liquid immiscibility and phase separation in the quaternary systems K₂OAl₂O₃CaOSiO₂ and Na₂OAl₂O₃CaOSiO₂

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